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Microwave Communications from the Outer Planets: The Voyager Project 来自外行星的微波通信:旅行者计划
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332675
A. Brejcha
{"title":"Microwave Communications from the Outer Planets: The Voyager Project","authors":"A. Brejcha","doi":"10.1109/EUMA.1979.332675","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332675","url":null,"abstract":"During the late 1970s, there is a rare alignment of the outer planets which allows a single spacecraft to fly a multip1anet mission. The Voyager Project, which will fly two spacecraft past Jupiter and Saturn, is such a mission. In the late summer of 1977, two Voyager spacecraft were launched from the Air Force Eastern Test Range at Cape Kennedy, Florida. They each carried experiments to gather information about Jupiter, Saturn, their satellites and the interplanetary medium between Earth and Saturn. The Voyager science data rates varied from 80 bits/s to 115.2 kbits/s. The exceptionally high data rates, coupled together with the enormous Jupiter and Saturn distances and available spacecraft power, presented some unique problems to the communications system designers. This paper summarizes the Voyager Project, the mission objectives, and the spacecraft communications system required to meet the mission objectives. The complexities and problems, such as power consumption, weight, and antenna pointing constraints are presented, along with a detailed description of the radio frequency and S/X-band antenna subsystems.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114754391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The Design of Planar Circulators for Broad-Band Operation 宽带平面环行器的设计
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332730
T. Miyoshi, S. Miyauchi
{"title":"The Design of Planar Circulators for Broad-Band Operation","authors":"T. Miyoshi, S. Miyauchi","doi":"10.1109/EUMA.1979.332730","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332730","url":null,"abstract":"The stripline circulator used in MIC is considered one of ferrite planar circuits. We investigated the optimum shape and operation condition of the planar circulator for broad-band operation, perceiving the wider freedom of the planar structure in circuit design. The wideband planar circulator, designed using the powerful contour-integral method, is triangularly shaped with wide coupling ports. The 20 dB isolation fractional bandwidth of the designed circulator is about 50 percent. Experimental results are also presented.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125441829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Miniature Hybrid L-Band Battery Operated FSK Transceiver 一种微型混合l波段电池供电FSK收发器
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332708
Charles N. Herbert, G. Wong
{"title":"A Miniature Hybrid L-Band Battery Operated FSK Transceiver","authors":"Charles N. Herbert, G. Wong","doi":"10.1109/EUMA.1979.332708","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332708","url":null,"abstract":"This paper describes a miniature transceiver which consists of three main sections: 1) a receiver portion with three active mixers, thick film limiter, and modem; 2) a transmitter portion with three active upconverters and a gated power amplifier; and 3) a local oscillator section containing a temperature compensated crystal oscillator which is shared by both transmitter and receiver. Design techniques to minimize current drain include active mixers and gated functions. Absolute frequency stability is provided by the interrogator's own frequency accuracy. Construction employs two Epsilam-10* boards sandwiching a Teflon** fiberglass voltage distribution layer. Use of these construction techniques alleviates the need for conventional high-cost cavity construction.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130181887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Results of TSD Calibrated Scattering Parameter Measurements Performed on a Commercial ANA 在商用ANA上进行的TSD校准散射参数测量结果
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332727
R. Speciale
{"title":"Results of TSD Calibrated Scattering Parameter Measurements Performed on a Commercial ANA","authors":"R. Speciale","doi":"10.1109/EUMA.1979.332727","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332727","url":null,"abstract":"The Through-Short-Delay (TSD) calibration method has been applied, for the first time, to the calibration and correction of measurements perfonned on a commercial automated network analyzer (ANA), located at the National Bureau of Standards, Boulder, Colorado. The processing of the calibration data and of the uncalibrated measurement data was performed, off-line, on a large scale timesharing facility using existing FORTRAN programs. The unprocessed calibration data and uncalibrated measurement data were obtained from the ANA in the form of data files on a floppy disk and transferred to the timesharing facility via a 9-track magnetic tape. A high degree of system repeatability has been demonstrated in this mode of operation. This was proven by mutual comparison of graphic displays of the corrected scattering parameters of multiple measurements of the same unknown and those of various pairs of error-two-ports (A and B), obtained from multiple calibration runs. These results clearly indicate the ultimate limits of resolution, accuracy and aynamic range of the system and point at the various limiting factors of the present hardware configuration.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122548867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Computer-Aided Pull-In Range Investigation of Microwave PLL 微波锁相环的计算机辅助拉入范围研究
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332647
P. Hasan, F. Jelinek, A. Kuchar
{"title":"Computer-Aided Pull-In Range Investigation of Microwave PLL","authors":"P. Hasan, F. Jelinek, A. Kuchar","doi":"10.1109/EUMA.1979.332647","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332647","url":null,"abstract":"An important parameter which characterizes the dynamic behaviour of the phase-lock loop is its pull-in range. This quantity is highly affected, especially at microwave frequency bands, by the transportation lag inherently present in the loop. A nonlinear model of the phase-lock loop has been used to investigate the effect of the phase detector characteristic, tuning characteristic of the voltage-controlled oscillator, the loop filter transfer function and the transportation lag on the pull-in range. The results of computer simulations are in good agreement with experiments performed with an X-band second-order phase-lock loop incorporating a phase detector with sinusoidal, triangular, or saw-tooth characteristic and a variable delay line.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115235886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radial Wave Excitation and the Radiation Condition in Planar Microwave Circuits 平面微波电路中的径向波激励与辐射条件
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332657
R. Jansen
{"title":"Radial Wave Excitation and the Radiation Condition in Planar Microwave Circuits","authors":"R. Jansen","doi":"10.1109/EUMA.1979.332657","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332657","url":null,"abstract":"In a detailed rigorous analysis it is shown how the radiation condition can be incorporated into the hybrid mode formulation of planar circuit boundary value problems. The analysis presented is based on the fact that the spectral domain Green's function of covered planar structures can be expressed in terms of radial wave eigenfunctions. It considers lossy substrates for the limiting case of vanishing losses and throws some light on the mechanism of the excitation of radial waves in planar circuits. Numerical results are presented for the microstrip case.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115438024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Scatterings by Feed and Struts on the Radiation Pattern of the Paraboloid 馈源和支板散射对抛物面辐射方向图的影响
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332701
P. Brachat, P. Combes
{"title":"Effects of Scatterings by Feed and Struts on the Radiation Pattern of the Paraboloid","authors":"P. Brachat, P. Combes","doi":"10.1109/EUMA.1979.332701","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332701","url":null,"abstract":"We determine the radiation pattern of a paraboloid by using the G.T.D. in its largest part as well as the aperture field and equivalent currents methods in the areas, around the forward and rear axis, where the G.T.D. fails. We take into account the scatterings by the primary feed and its supports by using respectively the G.T.D. and the equivalent currents method. We found a very good agreement between our theoretical results and experimental results obtained at 8,2 GHz with a paraboloid of D = 3,30 m.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131499301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Stripline Filter Derived from Directional Couplers 由定向耦合器导出的带状线滤波器
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332733
G. Saulich
{"title":"A Stripline Filter Derived from Directional Couplers","authors":"G. Saulich","doi":"10.1109/EUMA.1979.332733","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332733","url":null,"abstract":"A microwave filter consisting of two nonuniform-coupled transmission lines is presented. For this filter a synthesis procedure is described which reduces the design problem to the known synthesis of directional couplers. Eamples of filters are calculated, a bandpass with equal-ripple behavior in the passband and stopband, and a quasi-highpass.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"1994 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130920152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Computer-Aided Simultaneous Determination of Noise and Gain Parameters of Microwave Transistors 微波晶体管噪声和增益参数的计算机辅助同时测定
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332661
M. Sannino
{"title":"Computer-Aided Simultaneous Determination of Noise and Gain Parameters of Microwave Transistors","authors":"M. Sannino","doi":"10.1109/EUMA.1979.332661","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332661","url":null,"abstract":"A new method for the determination of noise and gain parameters of microwave linear two-ports (transistors) is presented. The method allows the simultaneous determination of the two parameter sets through a proper computer-aided procedure which processes the experimental data obtained from a measuring system employing noise meters and generators only. Experimental verifications carried-out on a microwave low noise transistor in S-band are reported.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114548218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The Application of Spectrum Conserving Modulation Methods to High-Capacity Digital Microwave Radio Relay Systems 频谱守恒调制方法在大容量数字微波无线电中继系统中的应用
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332706
G. Richman
{"title":"The Application of Spectrum Conserving Modulation Methods to High-Capacity Digital Microwave Radio Relay Systems","authors":"G. Richman","doi":"10.1109/EUMA.1979.332706","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332706","url":null,"abstract":"The planned introduction of digital switching by the British Post Office has motivated the development of high capacity digital transmission systems. It is intended that the radio relay bands currently carrying FDM-FM analogue transmissions will be re-used for digital systems. The application of spectrum conserving techniques has been found necessary for the realisation of digital radio-relay systems to make efficient use of the spectrum. Various modulation methods have been investigated and this paper illustrates how the application of spectrum conserving modulation methods influences the complexity and required technical standard of the equipment.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124922300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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